physics

posted by .

Unpolarized light is incident on four polarizing sheets with their transmission axes oriented as shown in the figure, in which θ1 = 27.0° and θ2 = 50.0°. What percentage of the initial light intensity is transmitted through this set of polarizers?

  • physics -

    If polarized light of intensity I₀ is incident on a polarizing sheet, the intensity transmitted by
    the sheet depends on the angle between the polarization direction of the light and the transmission axis of the sheet, φ, via
    I= I₀•cos²φ.

    After the 1st sheet
    I₁=0.5•I₀.

    After the 2nd sheet
    I₂=I₁•cos²φ₁=0.5•I₀•cos²27°=0.397•I₀.

    After the 2nd sheet
    I₃=I₂•cos²φ₂=0.397•I₀•cos²(50-27)°=0.336•I₀.

    After the 3rd sheet
    I₄=I₃•cos²φ₃=0.336•I₀•cos²(90-50)°=0.197•I₀.

    (I₄/I₀)•100%= 19.7%

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    The angle between the polarizer transmission axis and the plane of polarization of the incoming light is 30 +/- 2 deg. If the incident light intensity Io is 100 W/cm2 what would be the intensity I after the light is transmitted through …
  2. physics

    Two sheets of polaroid are arranged with their polarisation axes at angles of 0 and 90 degrees relative to the horizontal. Randomly polarized light is shone so that it passes through both filters. What fraction of the light is transmitted?
  3. Physics 2

    The average intensity of light emerging from a polarizing sheet is 0.807 W/m2, and the average intensity of the horizontally polarized light incident on the sheet is 0.972 W/m2. Determine the angle that the transmission axis of the …
  4. physics

    Linearly polarized light is incident on a piece of polarizing material. What is the ratio of the transmitted light intensity to the incident light intensity when the angle between the transmission axis and the incident electric field …
  5. Physics

    We want to rotate the direction of polarization of a beam of polarized light through 90 degrees by sending the beam through one or more polarizing sheets.(a) What is the mini-mum number of sheets required?
  6. physics

    The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate …
  7. physics

    The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate …
  8. much needed help...

    The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate …
  9. physics Damon???

    The sugar concentration in a solution (e.g., in a urine specimen) can be measured conveniently by using the optical activity of sugar and other asymmetric molecules. In general, an optically active molecule, like sugar, will rotate …
  10. Physics

    A beam of partially polarized light can be considered to be a mixture of polarized and unpolarized light. Suppose a beam of partially polarized light is sent through a polarizing filter. The polarization direction of the filter can …

More Similar Questions